NF-κB在高糖诱导“代谢记忆”致心肌细胞损伤的作用机制

目的探讨代谢记忆损伤心肌细胞的分子机制。方法体外培养20只SD大鼠乳鼠心肌细胞,每组5只,分为4组:持续低糖组、持续高糖组、代谢记忆组和PDTC组。计算细胞凋亡指数,免疫组化检测核内NF-κB的表达,Western Blot检测NF-κB蛋白,TUNEL检测细胞凋亡。结果代谢记忆组蛋白表达水平(1     

Capabilities of the RENEB network for research and large scale radiological and nuclear emergency situations

Abstract

Purpose: To identify and assess, among the participants in the RENEB (Realizing the European Network of Biodosimetry) project, the emergency preparedness, response capabilities and resources that can be deployed in the event of a radiological or nuclear accident/incident affecting a large number of individuals. These capabilities include available biodosimetry techniques, infrastructure, human resources (existing trained staff), financial and organizational resources (including the role of national contact points and their articulation with other stakeholders in emergency response) as well as robust quality control/assurance systems.

Materials and methods: A survey was prepared and sent to the RENEB partners in order to acquire information about the existing, operational techniques and infrastructure in the laboratories of the different RENEB countries and to assess the capacity of response in the event of radiological or nuclear accident involving mass casualties. The survey focused on several main areas: laboratory’s general information, country and staff involved in biological and physical dosimetry; retrospective assays used, the number of assays available per laboratory and other information related to biodosimetry and emergency preparedness. Following technical intercomparisons amongst RENEB members, an update of the survey was performed one year later concerning the staff and the available assays.

Conclusions: The analysis of RENEB questionnaires allowed a detailed assessment of existing capacity of the RENEB network to respond to nuclear and radiological emergencies. This highlighted the key importance of international cooperation in order to guarantee an effective and timely response in the event of radiological or nuclear accidents involving a considerable number of casualties. The deployment of the scientific and technical capabilities existing within the RENEB network members seems mandatory, to help other countries with less or no capacity for biological or physical dosimetry, or countries overwhelmed in case of a radiological or nuclear accident involving a large number of individuals.     

基层检验检疫局HIV筛查实验室质量管理现状与分析——以增城出入境检验检疫局为例

本文介绍了增城出入境检验检疫局（以下简称增城局）HIV筛查实验室质量管理现状,分析基层检验检疫局HIV筛查实验室在实际工作中存在的问题,查找管理工作中存在的不足,探讨解决问题的方法,总结在基层实验室工作的经验,为其他基层HIV筛查实验室提供一些借鉴,并就口岸HIV筛查实验室的发展提出看法。     

Relationship between periodontal disease status and combination of biochemical assays of gingival crevicular fluid

BACKGROUND: Currently, no biochemical assay involving gingival crevicular fluid is utilized routinely as a screening test for periodontal disease. OBJECTIVE: The objective of the present study was to evaluate the potential of gingival crevicular fluid assay as a screening methodology. METHODS: The subject population was comprised of 27 volunteers. Nine participants were classified as 'subject with periodontal destruction' (SPD) exhibiting at least one site with pocket depth and attachment loss>3.5 mm, whereas the remaining individuals were categorized as 'subject with minimal periodontal destruction' (SMD). Gingival crevicular fluid was collected from fixed sites via a standardized method. Biochemical assays of 12 substances (hemoglobin, albumin, transferrin, alpha(1)-antitrypsin, fibronectin, IgA, IgG, IgM, lactoferrin, myeloperoxidase and neutrophil elastase) were conducted at a commercial laboratory. Power transformation of total quantities in gingival crevicular fluid was performed for statistical analysis. RESULTS: Relationships between total quantity of each substance and periodontal disease status were unclear. Logistic regression analysis yielded six predictive models, which consisted of substance pairs: neutrophil elastase/IgA, neutrophil elastase/hemoglobin, neutrophil elastase/alpha(1)-antitrypsin and neutrophil elastase/IgG, and IgA/albumin and IgA/transferrin (p<0.05). Regression lines for SPD and SMD on a scattergram of IgA and neutrophil elastase were nearly parallel within the range of amounts in gingival crevicular fluid. The predictive model derived from both substances afforded sensitivity and specificity of 88% and 94%, respectively. CONCLUSIONS: These results indicated that the combination of IgA and neutrophil elastase in gingival crevicular fluid may be crucial for prediction of periodontal disease status. Furthermore, these data suggested that biochemical assays employing both substances in gingival crevicular fluid may provide a satisfactory screening test for periodontal disease.     

A laboratory study of glass ionomer cement as a retrograde root-filling material

This laboratory study investigated the use of various glass ionomer cements for retrograde root filling from the point of view of sealing qualities, ion release and ease of application. The sealing qualities of the material were tested by dye penetration and microscopic and SEM examination. Fluoride and silver ion release tests showed an initial loss of these two ions from the glass ionomer cement. A modified system for mixing and application was developed. Dye penetration did not differ from that of controls using vertically condensed gutta-percha. Glass ionomer cement is possibly a clinical alternative for the sealing of retrograde cavities; however, the silver-reinforced materials may cause tissue irritation from release of silver ions and their corrosion products.     

Allergic contact dermatitis from 4-chloro-7-nitrobenzofurazan

A 30-year-old pharmacist suffered from acute allergic contact dermatitis due to 4-chloro-7-nitrobenzofurazan (NBD-Cl). Contact allergy towards this reagent and 2 of its reaction products was proven by patch tests. As NBD-Cl has not been reported as an allergen before, the characteristics of this chemical and its use as an analytical reagent are briefly surveyed. Similarities to dinitrochlorobenzene (DNCB) are pointed out.     

三级甲等医疗机构制剂室改造存在问题及建议

目的：为医疗机构制剂室的改造提供建议。方法：汇总分析湖北省6家三级甲等医疗机构制剂室改造后发现的问题并提出相关建议。结果：医疗机构制剂室改造明显提升了产品质量,但存在一些问题,主要体现在设计布局、设施设备、文件、物料和人员等几个方面,主要原因是未能很好结合制剂室实际情况进行改造。结论：建议制剂室改造结合实际情况,图纸应经一线人员审议,配备足够的专业人员,及时升级文件系统,对发现的问题及时彻底整改,以实现医疗机构制剂室的可持续发展。